McDonnell & Miller 750-HW-MT-120 Control R-410A For contractors managing interrupted ignition

For contractors managing interrupted ignition applications

the VM3427 is specified for hot or chilled water and glycol solutions (up to 50%) and is not rated for steam service

valve lever

Unlike triple aquastats

Industry Equivalent: Fully interchangeable with 4074EYL/U

McDonnell & Miller 750-HW-MT-120 Control R-410A For contractors managing interrupted ignitionThe McDonnell & Miller 750 HW MT 120 (Part Number 176236) is a heavy duty 120Vac high water cut off designed to provide failsafe protection for steam boilers and hot water heating systems. Engineered for commercial and industrial environments, this manual reset control prevents hazardous overfill conditions by interrupting the burner circuit or water feeder pumps the moment water levels exceed the safety probe's threshold. Unlike automatic reset